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AMU Medical AMU Solved Paper-2010

  • question_answer
    AgCl is dissolved in excess of each of \[N{{H}_{3}}\], KCN and \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\]. The complex ions produced in each case are

    A)  \[{{[Ag{{(N{{H}_{3}})}_{2}}]}^{+}},{{[Ag{{(CN)}_{2}}]}^{+}}\]and \[{{[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}]}^{3-}}\]

    B)  \[{{[Ag{{(N{{H}_{3}})}_{2}}]}^{2+}},{{[Ag{{(CN)}_{2}}]}^{3-}}\] and \[{{[A{{g}_{2}}{{({{S}_{2}}{{O}_{3}})}_{2}}]}^{3-}}\]

    C)  \[Ag{{(N{{H}_{3}})}_{4}}{{]}^{2+}},{{[Ag{{(CN)}_{2}}]}^{3-}}\] and \[{{[A{{g}_{2}}{{({{S}_{2}}{{O}_{3}})}_{2}}]}^{3-}}\]

    D)  \[{{[Ag{{(N{{H}_{3}})}_{2}}]}^{+}},{{[Ag{{(CN)}_{2}}]}^{-}}\] and \[{{[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}]}^{3-}}\]

    Correct Answer: D

    Solution :

                                    \[AgCl+2N{{H}_{3}}\xrightarrow{{}}[Ag{{(N{{H}_{3}})}_{2}}]Cl\]                 \[AgCl+KCN\xrightarrow{{}}K[Ag{{(CN)}_{2}}]+{{K}^{+}}\] or                                                            \[{{[Ag{{(CN)}_{2}}]}^{-}}\] \[AgCl+N{{a}_{2}}{{S}_{2}}{{O}_{3}}\xrightarrow{{}}{{[Ag{{S}_{2}}{{O}_{3}})}_{2}}{{]}^{3-}}\]


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